Method of treating dishware in a domestic automatic dishwashing appliance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic dishwashing appliances do not effectively utilize detergent chemistry during the pre-washing step, leading to suboptimal cleaning performance, as the detergent remains inactive until the dispensing drawer opens during the main-washing step.
Innovation Solution
A water-soluble pouch design with separate chambers allows detergent components to be active in both the pre-washing and main-washing steps by having one chamber inside the dispenser drawer and another outside, connected by a linking portion of water-soluble film, enabling targeted chemistry addition in both stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detergent pouch is placed entirely inside the dispensing drawer, then the detergent chemistry is protected and remains inactive until the main-washing step, but the cleaning performance during the pre-washing step is suboptimal because no detergent chemistry is active
Solution Approach 1:
The detergent pouch is divided into two separate chambers: a first chamber containing detergent chemistry that dissolves during the pre-washing step, and a second chamber containing detergent chemistry that dissolves during the main-washing step. This segmentation allows the detergent to provide cleaning performance at both stages while maintaining stability through proper compartmentalization.
2Productivity
If the detergent pouch is designed with part inside and part outside the dispensing drawer, then the cleaning performance is improved by having detergent chemistry active during both pre-washing and main-washing steps, but the device complexity increases due to the multi-chamber structure
Solution Approach 1:
The pouch is segmented into two chambers connected by a linking portion, allowing each chamber to serve a specific function at different stages of the washing cycle. This segmentation achieves enhanced cleaning performance while maintaining a relatively simple overall structure that consumers can easily understand and use.
Solution Approach 2:
The single detergent pouch performs multiple functions: the first chamber provides cleaning chemistry during the pre-washing step, while the second chamber provides cleaning chemistry during the main-washing step. This multi-functionality is achieved within a single integrated pouch structure, avoiding the need for separate detergent products for different washing stages.
3Ease of operation
If a single unit dose detergent article is used to provide chemistry in both pre-washing and main-washing steps, then consumer ease of use is improved, but the manufacturing complexity increases due to the multi-chamber pouch design
Solution Approach 1:
The manufacturing process is segmented into loading the first chamber with pre-wash chemistry and the second chamber with main-wash chemistry, then sealing and connecting them with a linking portion. This segmented approach allows for efficient manufacturing while maintaining a simple single-pouch product that consumers find easy to use.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances dishwashing performance by allowing specific formulations to act in the pre-washing and main-washing steps, improving cleaning efficacy and consumer satisfaction with a single unit dose detergent article.
Implementation Method 1
The pouch comprises a water-soluble film that forms at least two separate chambers... the linking portion of film between the first chamber and second chamber has a length of at least 0.5 cm
Data Source
AI summary
A method for treating dishware in a domestic automatic dishwashing appliance is provided. The method uses order of addition of chemistry into the washing zone of the domestic automatic dishwashing appliance.